She devoted herself ______ to her research and it earned her a good reputation in her field. 

Our country will try to make greater progress in improving people's living conditions，________low­income families.

.If what your friend comes up with surprises you，don't reject it immediately._____，imagine that it is true.

_____ the woman entered the office, Tom’s eyes lit up.

The children loved their day trip，and they enjoyed the horse ride_____.